Coin Battery
Coin battery, also known as button cells, watch batteries, or coin-type batteries, are small single cells that resemble a flat cylinder. Their diameter typically ranges from 5 to 25 millimeters, and their height ranges from 1 to 6 millimeters. The main capacity ranges from 25mAh to 1100mAh. The bottom of a button cell is usually made of stainless steel and serves as the positive terminal, while the metal top serves as the negative terminal.
Due to their high energy density and compact size, button cells have become an indispensable component in modern portable electronic devices. Feel free to inquire about the specific model you need.
Low Temperature
3.0V lithium manganese dioxide metal battery -40~60℃
Normal Temperature
3.0V lithium manganese dioxide metal battery -20~60℃
Wide Temperature
3.0V lithium manganese dioxide metal battery -40~85℃
High Temperature
3.0V lithium manganese dioxide metal battery -40~125℃
3V coin cell battery models
We mainly produce various 3-volt button batteries with capacities ranging from 25mAh to 1100mAh, such as commonly used models like CR2032, CR2450, CR2025, and CR2025. We can accept OEM ODM orders. Which can develop specific batteries according to your requirements, and can also produce various pin batteries.
3V CR2032 Coin Cell Battery
Nominal voltage: 3V
Nominal capacity: 210mAh
Rated energy: 0.63Wh
Max Continue Current: 3mA
Weight: 3g
Size: 20.0*3.2mm
Temperature: -40~85℃
3V CR2450 Coin Cell Battery
Nominal voltage: 3V
Nominal capacity: 600mAh
Rated energy: 1.8Wh
Max Continue Current: 3mA
Weight: 6.4g
Size: 24.5*5.0mm
Temperature: -40~85℃
3V CR2025 Coin Battery
Nominal voltage: 3V
Nominal capacity: 150mAh
Rated energy: 0.45Wh
Max Continue Current: 3mA
Weight: 2.5g
Size: 20.0*2.5mm
Temperature: -40~85℃
Lithium Coin Battery Applications
Our button batteries are widely used in electronic products such as smart bracelets, smart meters, 3D glasses, Bluetooth headsets, electronic scales, LED lights, car remotes, anti-theft devices, and more. Besides these common applications, button batteries can also be used in the following fields:
Healthcare:
- Hearing aids
- Glucometers
- Thermometers
- Electronic blood pressure monitors
Toys and Games:
- Electronic toys
- Remote control toys
Sports and Fitness:
- Heart rate monitors
- Pedometers
- Sports watches
Battery coin cell advantages
- Compact and Lightweight
Button batteries are small and lightweight, making them ideal for devices with limited space, such as watches, calculators, remote controls, and Bluetooth headsets. - Long Service Life
Button batteries typically have a long service life, capable of running for years under normal usage conditions. Usually, one button battery can last for over a year. - Stable Discharge Voltage
Button batteries are known for their stable discharge curve, meaning the voltage remains steady throughout their usage, ensuring the reliable operation of devices. - Low Self-Discharge Rate
Most button batteries have a low self-discharge rate, with an annual self-discharge rate of less than 2%. This ensures they remain functional even after long-term storage.
Right is coin batteries with wires and button battery with connectors image.
coin batteries Models
Below are our coin button batteries. Except normal temperature -20~60℃, we can produce low temperature (-40~60℃), wide temperature (-40~85℃) and high temperature batteries (-40~125℃) with different models. Kindly check and reach us for further details.
Lithium Battery Factory-direct Pricing
- Minimum Order Quantity: 1,000 pieces per model.
- All orders come with the necessary certificates.
- Any model can be customized in terms of voltage, capacity, size, and charge/discharge rate.
Button Battery Manufacturing Process
Electrode Preparation
- Raw Material Sintering: Sinter the cathode and anode active materials using a furnace.
- Material Grinding: Grind the battery materials into smaller particles using a grinder.
- Material Mixing: Mix the active materials, conductive materials, and binders into a slurry using a mixer under vacuum conditions.
- Electrode Coating: Coat the slurry onto the current collector using a coater to form electrode sheets.
- Electrode Drying: Dry the newly made electrode sheets using a heater.
- Rolling: Roll the electrode sheets to the required thickness using a calender.
Battery Assembly
- Cutting Electrode Sheets: Cut the single-sided coated cathode, anode, and separator into disc shapes using a disc cutter.
- Stack Assembly: Stack the discs in the order required for the button cell case.
- Vacuum Drying: Dry the cells using a vacuum oven.
- Electrolyte Injection: Inject the appropriate amount of electrolyte into the cell case.
- Battery Sealing: Seal the button cells using a crimping machine.
Battery Testing
- Performance Testing: Test the performance of the button cells using a battery analyzer.
- Internal Resistance Testing: Measure the internal resistance of the cells using impedance testing tools.
Why select us as coin cell batteries supplier
Hongyitai is a coin battery manufacturer in China since 2014. All of our 3 volt rechargeable button battery are produced in our state-of-the-art lithium battery factory. All products meet strict international standards GB/T18287_2000 and testing requirements.
- Flexible customization: Utilizes lean production to accommodate small orders and a variety of order types.
- High performance: All chargeable coin batteries are under highly strictly production standards.
- Long lifespan: We can provide at least 1 year quality warranty.
- Free Samples Provided: We can provide free samples within 1 week.
- Certifications provided: We can provide certifications like UN38.3, MSDS, CE, RoHS, etc.
- Safe and reliable: Lithium batteries have good stability, and our batteries can be insured.
Our li-polymer battery production process
The following is a simplified description of our lithium polymer battery manufacturing process:
1. Mixing
Make a slurry of cathode (positive side) and anode (negative side) electrodes according to the scheme and recipe of the polymer battery model.
2. Coating
Paste is applied to a metal foil (aluminum for cathode, copper for anode). This creates the desired positive and negative plates
3. Cutting
Cut the dried electrode plates to the exact length and width required for the battery cell.
4. Winding
The cathode, anode and diaphragm are wound together. Forms the internal structure of the cell.
5. Injection of electrolyte
Inject electrolyte into the encapsulated cell to allow lithium ions to travel between the positive and negative plates.
6. Sealing & Formation
Encapsulate the cell with an aluminum-plastic film casing to prevent the electrolyte from being exposed. Activate the internal chemical material by charging and discharging.
7. Aging and Testing
Final test of capacity, voltage and overall performance through high and normal temperature aging tests.
FAQs for coin batteries
Our button batteries are rechargeable, with a voltage of 3V. The capacity ranges from 30mAh to 1100mAh.
If button batteries are accidentally swallowed, especially by children, they can cause serious injury or even be life-threatening. Therefore, it is essential to store batteries in a place that is out of reach of children.
It is generally recommended to seal the batteries with tape and place them in a designated battery recycling box to prevent leakage or accidental swallowing.
